Nuno Pereira via Postfix-users:
> Hello.
>
> We have a setup where postifix is configured to send all mails sent to domain
> virtualdomain.com are virtual and sent to realdomain.com.
>
> This is done with the following configuration:
>
> virtual_alias_domains = virtualdomain.com
>
> virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-email2email.cf
>
> virtual_mailbox_domains = realdomain.com
...
> The problem is with DSN for success messages: they're not returned for emails
> sent to @virtualdomain.com, but are for ones sent to @realdomain.com (which
> aren't a virtual on it's own).
When an alias is 1-many or when a virtual address is aliased to a
(different) real address, Postfix will send a DSN with action=expanded
for the virtual address. So maybe you should look for Postfix logs
with "action=expanded" notificiations.
The reason for sending an action=expanded DSN (with the virtual
address in the "Final-Recipient:" field) instead of action=success
(with the real address in the "Final-Recipient:" field) is that
Postfix tries to avoid revealing the real address to the sender.
Wietse
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